<template>
<div class="category">
    <el-row>
        <el-col :span="24">
            <el-breadcrumb separator="/">
                <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
                <el-breadcrumb-item>商品管理</el-breadcrumb-item>
                <el-breadcrumb-item>商品分类</el-breadcrumb-item>
            </el-breadcrumb>
        </el-col>
    </el-row>

    <el-row>
        <el-col :span="24">
            <el-button type="success" plain @click="addCategory">添加分类</el-button>
        </el-col>
    </el-row>

    <tree-grid
    :treeStructure="true"
    :columns="columns"
    :data-source="dataSource"
    @deleteCate="deleteCategory"
    @editCate="editCategory"
    >
    </tree-grid>

    <div class="page">
        <el-pagination
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
            :current-page="1"
            :page-sizes="[10, 20, 30, 40]"
            :page-size="10"
            layout="total, sizes, prev, pager, next, jumper"
            :total="total">
        </el-pagination>
    </div>

     <!-- 添加分类对话框 -->
    <el-dialog title="添加分类" :visible.sync="addDialogFormVisible">
      <el-form :model="addForm" label-width="80px" :rules="rules" ref="addCateForm">
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addForm.cat_name" auto-complete="off"></el-input>
        </el-form-item>
        <el-form-item label="父级名称">
          <el-cascader
            :options="options"
            v-model="selectedOptions"
            :props="props"
            @change="handleChange">
          </el-cascader>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="addDialogFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCateSubmit('addCateForm')">确 定</el-button>
      </div>
    </el-dialog>
</div>
</template>
           
<script>
import TreeGrid from "@/components/TreeGrid/TreeGrid";
import { getCategories, addCategories } from "@/api";
export default {
  data() {
    return {
      addForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0
      },
      options: [], // 级联选择器的数据源
      selectedOptions: [], // 级联选择器选中后的数据
      // props表示配置级联选择器展示的数据字段
      props: {
        value: "cat_id",
        label: "cat_name"
      },
      addDialogFormVisible: false,
      columns: [
        {
          text: "分类名称",
          dataIndex: "cat_name",
          width: ""
        },
        {
          text: "是否有效",
          dataIndex: "cat_deleted",
          width: ""
        },
        {
          text: "排序",
          dataIndex: "cat_level",
          width: ""
        }
      ],
      dataSource: [],
      total: 0,
      pagenum: 1,
      pagesize: 10,
      rules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ]
      }
    };
  },
  created() {
    this.initList();
  },
  methods: {
    deleteCategory(cid) {
      console.log(cid);
    },
    editCategory(cid) {
      console.log(cid);
    },
    handleSizeChange(val) {
      console.log(`每页 ${val} 条`);
      this.pagesize = val;
      this.initList();
    },
    handleCurrentChange(val) {
      console.log(`当前页: ${val}`);
      this.pagenum = val;
      this.initList();
    },
    initList() {
      getCategories({
        type: "3",
        pagenum: this.pagenum,
        pagesize: this.pagesize
      }).then(res => {
        console.log(res);
        if (res.meta.status === 200) {
          this.total = res.data.total;
          this.dataSource = res.data.result;
        }
      });
    },
    handleChange(value) {
      console.log(value);
    },
    addCategory() {
      this.addDialogFormVisible = true;
      getCategories({ type: "2" }).then(res => {
        console.log(res);
        if (res.meta.status === 200) {
          this.options = res.data;
        }
      });
    },
    addCateSubmit(formName) {
      this.$refs[formName].validate(valide => {
        if (valide) {
          if (this.selectedOptions.length === 0) {
            this.addForm.cat_pid = 0;
            this.addForm.cat_level = 0;
          } else if (this.selectedOptions.length === 1) {
            this.addForm.cat_pid = this.selectedOptions[
              this.selectedOptions.length - 1
            ];
            this.addForm.cat_level = 1;
          } else {
            this.addForm.cat_pid = this.selectedOptions[
              this.selectedOptions.length - 1
            ];
            this.addForm.cat_level = 2;
          }
          addCategories(this.addForm).then(res => {
            if (res.meta.status === 201) {
              this.addDialogFormVisible = false;
              this.initList();
              this.$message({
                type: "success",
                message: res.meta.msg
              });
            }
          });
        }
      });
    }
  },
  components: {
    TreeGrid
  }
};
</script>
<style lang = 'scss' scoped>
.category {
  .page {
    padding: 5px 0;
    background-color: #d3dce6;
  }
}
</style>